明京师保卫战是明朝以于谦为首的军民抵抗蒙古瓦剌军侵犯的正义战争。瓦剌是居于漠北的蒙古族三部之一。明朝初年,脱欢统治瓦剌。英宗正统四年,脱欢死后子也先继太师位并自称淮王。他开始东征西讨,当势力渐渐强大后便梦求再现大元一统天下的局面,于是其锋芒直指中 The Ming war of Ming Dynasty was a just war by the military and civilian leaders headed by Qian in the Ming Dynasty to resist the assault by Mongolia’s Waving Army. Wala is one of the Mongol tribes living in Mobei. The early Ming Dynasty, Vassal recumbrance rule. British imperialist orthodox four years, after the death of offenders also follow the first teacher and claiming to be the King of Huai. He began to seek concessions to the West. When the forces became increasingly powerful, they dreamed of reproducing the status of the Taiwanese under the rule of the world. As a result,